Propeller pitch adjustment and blade de-icing system comprising a low-radius rotating transformer and an electro-hydraulic actuation device

Abstract

Pitch adjustment and de-icing system for the blades of a propeller comprising a low-radius rotating transformer and an electro-hydraulic actuation device. Pitch adjustment and de-icing system (10) for the blades (14) of a propeller (12) of an aircraft comprising a rotary drive element (20); a first inverter device (46) configured to deliver a primary alternating voltage (VpAC); a reduction device (24); a low-radius rotating transformer (40) having a primary circuit (42) and a secondary circuit (44); a de-icing device (60); an electro-hydraulic actuation device (88) comprising a cylinder (90) and a pump (94) configured; an electric motor (70) comprising a stator (72) and a drive shaft (74) cooperating with said pump in order to actuate the latter at an actuation speed enabling the cylinder to be supplied according to a chosen flow rate, regardless of the rotation speed of the pump body;and a second inverter device (76) configured to supply the electric motor with an alternating voltage (Vm) from a constant direct voltage supplied by an electrical power source. Figure for the abstract: Fig. 1.;

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